<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div{
            /* width: 100px;
            height: 100px; */
            /* background-color: red;
            transition: all 1s ease-in-out 1s;
            padding-left: 50px;
            padding-right:100px;
            padding-top:150px;
            padding-bottom:40px;
            margin-right:50px; */

            width: 100px;
            height: 100px;
            padding: 10px;
            content:"这是一个盒子";
            color:black;
            /* border: 2px solid red;
            margin: 10px;*/
            background: green;
        }
    </style>
</head>
<body>
    <div></div>
    <P>还有什么要说</P>
    
</body>
</html>